An accurate test method for the efficiency of a pwm excitation source permanent magnet motor

A technology of permanent magnet motor and testing method, which is applied in the direction of motor generator testing, measuring electricity, measuring devices, etc., can solve the problem of inaccurate measurement of PWM power supply motor efficiency, etc., and achieve the effect of accurate motor CAE simulation test

Active Publication Date: 2021-05-25
BEIDOU AEROSPACE AUTOMOBILE BEIJING CO LTD
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Problems solved by technology

[0006] In view of the above problems, the present invention is proposed in order to provide an accurate test method for the efficiency of the PWM excitation source permanent magnet motor that overcomes the above problems or at least partially solves the above problems, and solves the problem of inaccurate measurement of the current PWM power supply motor efficiency

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  • An accurate test method for the efficiency of a pwm excitation source permanent magnet motor
  • An accurate test method for the efficiency of a pwm excitation source permanent magnet motor
  • An accurate test method for the efficiency of a pwm excitation source permanent magnet motor

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Embodiment Construction

[0057] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0058] Those skilled in the art will understand that unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the word "comprising" used in the description of the present invention refers to the presence of said features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more o...

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Abstract

The invention relates to an accurate test method for the efficiency of a PWM excitation source permanent magnet motor, comprising: when a sine wave power supply supplies power to the permanent magnet motor: the permanent magnet motor is connected to a predetermined load, and the sine wave load loss is obtained through calculation; the permanent magnet motor is not connected When the PWM wave power supply supplies power to the permanent magnet motor: the permanent magnet motor is connected to the predetermined load, and the PWM wave load loss is calculated; the permanent magnet motor is not connected to the predetermined load, and the PWM wave empty load loss is calculated. Load loss; Calculate the efficiency of the permanent magnet motor when powered by PWM wave power supply according to the sine wave load loss, PWM wave load loss, sine wave no-load loss and PWM wave no-load loss, and use it as the efficiency of the permanent magnet motor as the PWM excitation source. The invention extracts the harmonic loss when the PWM wave power supply is the motor power supply, adds the harmonic loss to the sine wave loss, and can accurately calculate the efficiency of the permanent magnet motor of the PWM excitation source.

Description

technical field [0001] The invention relates to the technical field of motor parameter measurement, in particular to an accurate test method for the efficiency of a PWM excitation source permanent magnet motor. Background technique [0002] With the rapid development of power electronics technology, PWM (Pulse Width Modulation, Pulse Width Modulation) power supply motors are widely used in the new energy vehicle industry. The industries sensitive to motor efficiency are urgently required to accurately test the efficiency of PWM power supply motors. However, due to PWM The additional iron loss and winding additional loss caused by the voltage and current harmonics in the power supply motor are the main factors that lead to the inaccurate efficiency of the PWM power supply motor. [0003] At present, the motor efficiency is indirectly measured by collecting the motor input and output side power comparison calculation efficiency or calculating the motor loss method. Compared wi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/34
CPCG01R31/343
Inventor 刘贵生吕佳明刘志钢吴庆国吕学文
Owner BEIDOU AEROSPACE AUTOMOBILE BEIJING CO LTD
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